December weather forecast
Athuruwela, Sri Lanka

December, the first month of the winter in Athuruwela, is still a warm month, with an average temperature fluctuating between 29.9°C (85.8°F) and 23.7°C (74.7°F).

Temperature

The average high-temperature during December registers at a warm 29.9°C (85.8°F), maintaining a close resemblance to the previous month. During the month of December, Athuruwela anticipates a mean low-temperature of 23.7°C (74.7°F).

Heat index

December's average heat index is evaluated at a sweltering 37°C (98.6°F). Adopt heightened preventive measures, heat exhaustion and heat cramps are probable. Persistent activity could lead to heatstroke.
Note that heat index values are valued for light wind and location in the shade. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'feels like' or 'real feel', is a value derived by merging air temperature with the humidity to convey how the climate feels. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.

Humidity

The average relative humidity in December in Athuruwela, Sri Lanka, is 79%.

Rainfall

In December, in Athuruwela, Sri Lanka, the rain falls for 20.3 days. Throughout December, 139mm (5.47") of precipitation is accumulated. In Athuruwela, during the entire year, the rain falls for 265.4 days and collects up to 1744mm (68.66") of precipitation.

Sea temperature

In Athuruwela, the average seawater temperature in December is 28°C (82.4°F).
Note: Water activities including swimming and diving are pleasurable in temperatures between 25°C (77°F) and 29°C (84.2°F), ensuring comfort and enjoyment for extended time frames.

Daylight

With an average of 11h and 42min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 06:06 and sunset at 17:50. On the last day of December, in Athuruwela, sunrise is at 06:21 and sunset at 18:03 +0530.

Sunshine

In Athuruwela, the average sunshine in December is 7h.

UV index

January through April, July, September, November and December, with an average maximum UV index of 7, are months with the highest UV index in Athuruwela. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the average person.
Note: The maximum daily UV index, 7 in December, converts into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Be careful! The Sun's UV radiation is accentuated by reflecting off sand and water.